A186683 Total number of n-digit numbers requiring 18 positive biquadrates in their representation as sum of biquadrates.

0, 2, 17, 5, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0

Offset

1,2

Comments

A161905(n) + A186650(n) + A186652(n) + A186654(n) + A186656(n) + A186658(n) + A186660(n) + A186662(n) + A186664(n) + A186666(n) + A186668(n) + A186670(n) + A186672(n) + A186674(n) + A186676(n) + A186678(n) + A186681(n) + a(n) + A186685(n) = A052268(n)

a(n) = 0 for n >= 5. - Nathaniel Johnston, May 09 2011

Links

Table of n, a(n) for n=1..86.

Eric Weisstein's World of Mathematics, Waring's Problem.

Index entries for linear recurrences with constant coefficients, signature (1).

Formula

a(n) = A186682(n) - A186682(n-1).

Crossrefs

Cf. A046049, A099591.

Sequence in context: A155895 A293179 A144212 * A210492 A355555 A370111

Adjacent sequences: A186680 A186681 A186682 * A186684 A186685 A186686

Keyword

nonn,base,easy

Author

Martin Renner, Feb 25 2011

Status

approved